[2] The number of moults varies between species; growth is also very variable and may take a few weeks to some months depending on food availability and weather conditions.

[5][6][7] A recent comprehensive phylogeny based on analyses of data from transcriptomes and mitochondrial genomes found the following relationships within Orthoptera.

[15] In Madagascar and Oaxaca, grasshoppers and locusts are usually collected early in the morning when it is cooler as the orthopterans are less mobile due to being cold-blooded.

[15] In the second century BCE in Ancient Greece, Diodorus Siculus is known to have called people from Ethiopia Acridophagi, meaning "eaters of locusts.

The list of dietary laws in the book of Leviticus forbids all flying insects that walk, but makes an exception for certain locusts.

[16] The Torah states the only kosher flying insects with four walking legs have knees that extend above their feet so that they hop.

[17] With new research showing promise in locating alternative biofuel sources in the gut of insects, grasshoppers are one species of interest.

The insect's ability to break down cellulose and lignin without producing greenhouse gases has aroused scientific interest.